The O-Ring, cataloged under National Stock Number 5331-01-065-7429, is classified within Federal Supply Class 5331 (O-ring) of the Hardware and Abrasives group. The manufacturer of record is Calzoni Srl. Government technical data includes 8 specifications, cited from the U.S. Government catalog. The record lists 1 manufacturer part number for this item, enabling identification through both NSN and commercial part number lookups. 7 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 2 items share a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5331-01-065-7429 |
| Primary Part Number | D0551336 |
| Item Name | O-Ring |
| FSC / FSG | 5331 / 53 — O-ring |
| Manufacturer | Calzoni Srl |
| Status | ACTIVE |
| Temp Rating | -40.0 FAHRENHEIT AND 250.0 FAHRENHEIT DEGF |
| Cross-Sectional Height | 0.205 INCHES MINIMUM AND 0.215 INCHES MAXIMUM IN |
| Outside Diameter | 4.395 INCHES NOMINAL IN |
| Criticality Code Justification | ZZZY |
| Center Hole Diameter | 3.960 INCHES MINIMUM AND 3.990 INCHES MAXIMUM IN |
| Test Data Document | 81349-MIL-P-23199 SPECIFICATION (INCLUDES ENGINEERING TYPE BULLETINS, BROCHURES,ETC., THAT REFLECT SPECIFICATION TYPE DATA IN SPECIFICATION FORMAT; EXCLUDES COMMERCIAL CATALOGS, INDUSTRY DIRECTORIES, AND SIMILAR TRADE PUBLICATIONS, REFLECTING GENERAL TYPE DATA ON CERTAIN ENVIRONMENTAL AND PERFORMANCE REQUIREMENTS AND TEST CONDITIONS THAT ARE SHOWN AS "TYPICAL", "AVERAGE", "NOMINAL", ETC.). |
| Material | RUBBER BUTADIENE-ACRYLONITRILE CLASS NBR |
| Reference Number Differentiating Characteristics | CERTIFIED FREE FROM MERCURY CONTAMINATION |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | Y |
| Part Number | Manufacturer |
|---|---|
| D0551336 | Calzoni Srl (ITA) |
| Reference | Meaning |
|---|---|
| AS568-345MILG21569CL1 | 5/9 Secondary reference U.S. Government activity |
| AS568-345 | 3/9 Design control — primary reference U.S. Government activity |
| MILG21569CL1 | 5/1 Secondary reference U.S. Government activity |
| F-412 PART 6303 | 5/1 Secondary reference Atkinson Guy F Co Willamette Iron and Steel Co Div |
| 3140029 | C/1 Advisory reference — outside the item-of-supply concept Zf Industrieantriebe Witten Gmbh |
| 2-345N674-70 | C/1 Advisory reference — outside the item-of-supply concept Parker-Hannifin Corp Div O-Ring Division |
| AS568-345 | 3/1 Design control — primary reference Sae International Dba Sae International |
NSN 5331-01-065-7429 is a O-Ring, manufactured by Calzoni Srl, classified under FSC 5331, O-ring. Status: active.
NSN 5331-01-065-7429 has 1 manufacturer part number on file: D0551336 (Calzoni Srl).
2 possible matches (shared part number, not a government interchangeability claim): 5331-01-113-9862, 5331-01-497-7903. Verify interchangeability with system specifications before substitution.
Key specifications for D0551336: Temp Rating: -40.0 FAHRENHEIT AND 250.0 FAHRENHEIT DEGF; Cross-Sectional Height: 0.205 INCHES MINIMUM AND 0.215 INCHES MAXIMUM IN; Outside Diameter: 4.395 INCHES NOMINAL IN; Criticality Code Justification: ZZZY. 8 specifications are documented in the U.S. Government catalog.
No hazard code in the DLA record (HMIC N). Hazard information on this page is shown exactly as it appears in the DLA record.
U.S. Government catalog: edition PUBLOGDVD v12.0.0 (OCT 2026), edition date 2026-10-01, retrieved 2026-10-16.
U.S. Government catalog: edition PUBLOGDVD v12.0.0 (OCT 2026), edition date 2026-10-01, retrieved 2026-10-18.